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Eumetazoa (metazoans)
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Bilateria (bilaterally symmetrical animals)
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Protostomia (protostomes)
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Arthropoda (arthropods)
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Chelicerata (spiders, mites, scorpions, and relatives)
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Class Merostomata
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Order Xiphosura
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Family Limulidae
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Genus Carcinoscorpius
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Genus Limulus
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Genus Tachypleus
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